1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kondaur [170]
3 years ago
14

A circular gift has a 4.75 inch radius. Ilyssa wants to wrap a ribbon that costs $0.50 per inch around the gift. How much money

will she spend?
Mathematics
1 answer:
ollegr [7]3 years ago
4 0

Answer:

$14.93

Step-by-step explanation:

If the cost is per inch, then we need perimeter otherwise if the cost was per square inch we would have looked for the area.

Total cost=circumference* cost per inch

Circumference of a circle is given by

C=2\pi r

Where r is radius. Substituting 4.75 inch for r then

C=2\pi\times 4.75=29.857142857142\\C\approx 29.86 inch

Cost=29.86*0.50=$14.93

You might be interested in
6. How many odd positive integers less than 300 can be written using<br> the numbers 2, 4, 5, and 8?
icang [17]

Answer:

5

Step-by-step explanation:

25, 45, 85, 245, 285

3 digit numbers must start with 2 as anything else would be more than 300

All numbers must end with 5 as that is the only odd number.

5 0
3 years ago
Show that the sets of upper-triangular and lower-triangular matrices are subspaces of F n,n . Call them U and L respectively. Wh
soldi70 [24.7K]

Answer:

dim L = dim U = \frac{n(n+1)}{2}

Step-by-step explanation:

We can do it only for the lower-triangular matrices, the case of the upper-triangular matrices is similar. We might caracterice nxn the lower-triangular matrices, as the nxn matrices A=(a_{ij}) such that the entry a_{ij}=0 if i<j.

Now let A=(a_{ij}) and B=(b_{ij}) be two lower triangular matrices, now if

C=A+\lambda  B for some \lambda \in \mathbb{F}

then the entry c_{ij} of C is equal to

c_{ij}=a_{ij}+\lambda b_{ij}

Now, if i<j, it must hold that a_{ij}=0 \quad \text{and} \quad b_{ij}=0. Therefore, if this is the case we must have that c_{ij}=0 and so we get that C is also a lower triangular matrix. This showa that L is closed under sum and scalar multiplcation, hence it is a linear subspace.

To find the dimension, note that all the entries of a lower-triangular matrix over the diagonal must be equal to zero. However, each entry of the matrix under the diagonal and in the diagonal might be any element of \mathbb{F}, any entry that can be choosen add up to the dimension of L, we n such elemnts for the first column, (n-1) for the second column, (n-2) for the third column etc.... Therefore,

\dimL=n+(n-1)+(n-2)+...+2+1=\dfrac{n(n+1)}{2}

5 0
3 years ago
PLEASE HELP ASAP!!! CORRECT ANSWERS ONLY PLEASE!!!
Andreyy89

Answer:

No.

Step-by-step explanation:

8 0
3 years ago
A landscaping company placed three orders with a nursery. The first order was for bushes, trees, and bundles of flowers, and tot
notsponge [240]

To add the bushes and trees, to get 19 bushes and 6 trees, but this wouldn't get me anywhere, because I don't have subtotals for the bushes and trees.

So I'll pick variables (b for the number of bushes and t for the number of trees) and set up a system of equations:

first order: 13b + 4t = 487

second order: 6b + 2t = 232

Multiplying the second row by –2, I get:

13b + 4t = 487

–12b – 4t = –464

This says that b = 23.

Back-solving, I get that t = 47.

Of course, the exercise didn't ask for the values of the two variables. Translating back into English, the solution is,

each bush is $23 and each tree is $47.

To learn more about the variable visits:

brainly.com/question/2804470

#SPJ1

8 0
2 years ago
What is the period of the sine funtion y = sin (2x) ?
Margarita [4]

Answer: a

Step-by-step explanation:

2x=2\pi

x=\pi ==> Period: \pi ==> a

8 0
2 years ago
Read 2 more answers
Other questions:
  • Write and algebraic expression for 3 less than the quotient of 20 and x
    6·1 answer
  • What is the answer to w/2 +7=w/3+9?
    6·2 answers
  • What is 8244 estimated
    12·2 answers
  • Choosing a 4-letter password using only 5 letters that may each be used more than once. How do you do this??
    11·1 answer
  • the classroom encyclopedia set fills a shelf that is 24 inches long each book is 3/4 inch thick how many books are in the classr
    10·1 answer
  • Solve for x and y .
    7·1 answer
  • Y – 84 = -11(x – 6)<br> What is the point and slope
    14·1 answer
  • I need help with this...I'm so confused on #10. Can someone help me please???
    14·1 answer
  • There are 4 black, 4 red, and 4 white marbles in a box. How many marbles do you have to take out (without looking) to be sure yo
    6·1 answer
  • Natalie just rented an apartment for $900 a month for the first year. She was told that the rent will increase by $50 each year.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!